Ah - I am re-reading the opening post in this thread and noting the budget consideration. While Ann Arbor is a great town for eating, it is not a great town for eating cheaply. I might suggest Krazy Jim's Blimpy Burgers. It's not right downtown, but you can walk there from downtown easily. Corner of S. Divison and Packard. The other hidden gem is Le Dog. They are only open for lunch and only weekdays and it's take out. However, they have the best lobster bisque you will ever have. Soup is their *thing* and it is all fantastic. They have hot dogs too, but trust me, have the soup. They're located on Main Street, in the block between Liberty and William. The place is tucked into a little oh, I guess you'd call it an arcade (not Nichols Arcade, for those who know that landmark). If you find a store call Mezzanine, you've found the right building. 306 S. Main Street. Also, the original location is still open at 410 E. Liberty.